Blood vessels. Coloured scanning electron micrograph (SEM) of a resin cast of blood vessels from the small intestine. This network of vessels infiltrates the tissue,supplying it with blood. At left are the larger vessels of the outer wall and at right are the thinner vessels of the inner wall. The inner wall contains fold,called villi,that greatly increase the surface area for the absorption of nutrients. The cast was made by injecting resin into the blood vessels and then chemically digesting the surrounding tissues | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Nishinaga, Susumu |
Bildgröße: | 2894 px × 3858 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |